diff --git a/README.md b/README.md
index 652fc35..390af8d 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # start
 ```
 npm install
-npm run start --${port} // default: 12345
+npm run start ${port} // default: 12345
 ```
 
 # api